Microbial air sampler



FIG. 1 is a right front perspective view of a microbial air sampler showing my new and ornamental design, a left front perspective view being a mirror image; and,

FIG. 2 is an elevational right side view thereof, a left side view being a mirror image.

The broken lines in FIG. 1 represent the bounds of the claim and form no part of the claimed design. 

CLAIM The ornamental design for a microbial air sampler, as shown and described. 